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The PROPER BIASING OF A TRANSISTOR enables the transistor to be used as an amplifier. To
function in this capacity, the emitter-to-base junction of the transistor is forward biased, while the base-to-
collector junction is reverse biased.
NPN TRANSISTOR OPERATION is basically the action of a relatively small emitter-base bias
voltage controlling a relatively large emitter-to-collector current.
PNP TRANSISTOR OPERATION is essentially the same as the NPN operation except the
majority current carriers are holes and the bias batteries are reversed.
AMPLIFICATION is the process of increasing the strength of a signal.
An AMPLIFIER is the device that provides amplification without appreciably altering the original
signal.
